Progressive CPU Volume Rendering with Sample Accumulation

Usher, Will; Amstutz, Jefferson; Brownlee, Carson; Knoll, Aaron; Wald, Ingo

Progressive CPU Volume Rendering with Sample Accumulation

Files

021-030.pdf (34.48 MB)

Date

2017

Authors

Usher, Will
Amstutz, Jefferson
Brownlee, Carson
Knoll, Aaron
Wald, Ingo

Publisher

The Eurographics Association

Abstract

We present a new method for progressive volume rendering by accumulating object-space samples over successively rendered frames. Existing methods for progressive refinement either use image space methods or average pixels over frames, which can blur features or integrate incorrectly with respect to depth. Our approach stores samples along each ray, accumulates new samples each frame into a buffer, and progressively interleaves and integrates these samples. Though this process requires additional memory, it ensures interactivity and is well suited for CPU architectures with large memory and cache. This approach also extends well to distributed rendering in cluster environments. We implement this technique in Intel's open source OSPRay CPU ray tracing framework and demonstrate that it is particularly useful for rendering volumetric data with costly sampling functions.

        @inproceedings{10.2312:pgv.20171090
,
booktitle = {Eurographics Symposium on Parallel Graphics and Visualization
},
editor = {Alexandru Telea and Janine Bennett
},
title = {{Progressive CPU Volume Rendering with Sample Accumulation
}},
author = {Usher, Will and 
Amstutz, Jefferson and 
Brownlee, Carson and 
Knoll, Aaron and 
Wald, Ingo
},
year = {2017
},
publisher = {The Eurographics Association
},
ISSN = {1727-348X
},
ISBN = {978-3-03868-034-5
},
DOI = {10.2312/pgv.20171090
}
}